'Glee' has understandably commanded its fair share of headlines in recent months, even as the series is poised to wrap up its final season in 2015, but it seems longtime fans of the series have some seriously good news: the upcoming 100th episode will feature the returns of most of the original cast, including repeat guest star and Broadway sensation Kristin Chenoweth.

Dianna Agron is the latest original 'Glee' cast member to sign on for the 100th episode, which will see fans choosing the songs from the catalogue of 'Glee' performances over the years. Series creator Ryan Murphypreviously tweeted an open invitation for former guest stars to return, while thus far Harry Shum Jr., Mark Salling, Amber Riley, and Heather Morris have all confirmed returns.

Both Agron and Morris returns in particular should please fans, given that neither were present for "The Quarterback" episode memorializing series star Cory Monteith, while Morris hadn't appeared since the fourth season. Elsewhere, Chenoweth's last appearance took place in the second season, despite the show's focus having shifted largely to New York, wherein the character supposedly moved.

'Glee' will air its 100th episode on March 18, but what say you? What other characters would you want to see reprised for the 'Glee' milestone?